The Batman and the Bridge Builder
99% Invisible23 Feb 2021

The Batman and the Bridge Builder

Mark Bloschock is an engineer from Texas, and in the late 1970s he got a job with the Texas Department of Transportation renovating the Congress Avenue Bridge. The bridge was a simple concrete arch bridge that spans Lady Bird Lake in downtown Austin. It needed to be rebuilt with more contemporary beams called “box beams.” The box beams sit below the road’s surface, and they needed to be spaced a certain distance apart. Bloschock and the other engineers decided that the gap should be somewhere between ¾ of an inch and an inch and a half, which didn’t seem like a particularly meaningful decision… until the bats moved in.

A tale of bats and bridges and how the built environment and the natural environment don’t need to be at odds with one another.

The Batman and the Bridge Builder

Plus, we talk with Simon Doble, CEO of Solar Buddy. Light access (both day and night) is a basic need many people take for granted. SolarBuddy is an Australian charity uniting a global community with a big dream to gift six million solar lights to children living in energy poverty by 2030, to help them to study after dusk and improve their education outcomes.

99% Invisible’s Impact Design coverage is supported by Autodesk. The Autodesk Foundation supports the design and creation of innovative solutions to the world’s most pressing social and environmental challenges. Learn more about these efforts on Autodesk’s Redshift, which tells stories about the future of making across architecture, engineering, infrastructure and manufacturing.

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You Are Listening To + Radio Net

You Are Listening To + Radio Net

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Free Speech Monument

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BLDGBLOG: On Sound

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Nikko Concrete Commando

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RJDJ Reactive Music

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Liberation Squares plus NY Dick

Liberation Squares plus NY Dick

In a recent piece from Urban Omnibus, Vishaan Chakrabarti (Professor at the Graduate School for Architecture, Planning and Preservation at Columbia University), wrote about how urban open spaces contribute to political change, “Public spaces like Tompkins Square, Tiananmen Square and … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

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Check Cashing Stores

Check Cashing Stores

A few years ago, journalist Douglas McGray learned that the largest chain of check cashing stores in Southern California, Nix Check Cashing, was being bought by the nation’s largest credit union, Kinecta. The credit union thought it had something to … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

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Concrete Furniture

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The New City Hall, designed by Finnish architect Viljo Revell, was the first modern, concrete, civic building in Toronto. When it opened in 1965, it stood out very prominently in the traditional Victorian fabric of the city. The striking concrete … Continue reading → Subscribe to SiriusXM Podcasts+ to listen to new episodes of 99% Invisible ad-free and a whole week early. Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.

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